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Honours memory size request.

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This commit is contained in:
Thomas Harte 2021-06-22 21:48:55 -04:00
parent 88f0f2b623
commit 0d165740ea
1 changed files with 15 additions and 2 deletions
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17
Machines/Enterprise/Enterprise.cpp
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@ -69,8 +69,21 @@ template <bool has_disk_controller> class ConcreteMachine:
public MachineTypes::MediaTarget,
public MachineTypes::ScanProducer,
public MachineTypes::TimedMachine {
private:
constexpr uint8_t min_ram_slot(const Analyser::Static::Enterprise::Target &target) {
size_t ram_size = 128*1024;
switch(target.model) {
case Analyser::Static::Enterprise::Target::Model::Enterprise64: ram_size = 64*1024; break;
case Analyser::Static::Enterprise::Target::Model::Enterprise128: ram_size = 128*1024; break;
case Analyser::Static::Enterprise::Target::Model::Enterprise256: ram_size = 256*1024; break;
}
return uint8_t(0x100 - ram_size / 0x4000);
}
public:
ConcreteMachine([[maybe_unused]] const Analyser::Static::Enterprise::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
min_ram_slot_(min_ram_slot(target)),
z80_(*this),
nick_(ram_.end() - 65536) {
// Request a clock of 4Mhz; this'll be mapped upwards for Nick and Dave elsewhere.
@ -339,11 +352,11 @@ template <bool has_disk_controller> class ConcreteMachine:
private:
// MARK: - Memory layout
std::array<uint8_t, 128 * 1024> ram_;
std::array<uint8_t, 256 * 1024> ram_;
std::array<uint8_t, 64 * 1024> exos_;
std::array<uint8_t, 16 * 1024> basic_;
std::array<uint8_t, 32 * 1024> dos_;
const uint8_t min_ram_slot_ = uint8_t(0x100 - (ram_.size() / 0x4000));
const uint8_t min_ram_slot_;
const uint8_t *read_pointers_[4] = {nullptr, nullptr, nullptr, nullptr};
uint8_t *write_pointers_[4] = {nullptr, nullptr, nullptr, nullptr};